JPS58191183A - Printing apparatus - Google Patents

Abstract

PURPOSE:To enhance a printing speed and to reduce noise, by carrying out the up-and-down movements of a printing ribbon and a correcting ribbon and quantitative feeding by every typing to be performed by one drive motor. CONSTITUTION:A signal is sent to a type selecting motor 9 to revolve the combination of spokes 7 and an indicated type 8 is selected. At the same time, a motor 16 is driven to push up a platform 13 while the upper stage position (a) of the printing ribbon 34 in a printing ribbon cassette 11 is coincided with the central part of the type 8 and a signal is sent to a printing hammer mechanism 10 to print printing paper 2. In the next step, the next type is selected by the motor 9 and pushed up so as to position the lower stage position (b) of the ribbon to the central part of the type. In addition, when the correction of printing is carried out, the motor 16 is driven to push up the position (c) of a correcting ribbon 35 to a printing surface through a feed pin 29 and error typing is retyped to peel off carbon.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for using a printing ribbon (carbon ribbon) and a correction ribbon in a printing device in which a printing mechanism equipped with type moves along a platen and prints on a sheet of paper disposed in close proximity to the platen. This relates to a mechanism for vertical movement and fixed amount feeding with respect to the printing surface. Previously, this type of machine II4 was equipped with separate drive sources for the vertical movement of the printing ribbon and correction ribbon, as well as for their quantitative feeding, but recently, with the advancement of drive control methods, the structure of the device has been simplified and streamlined. Therefore, it is required that these operations be controlled by a single driving source. It is an object of the present invention to provide a printing device equipped with a drive B& structure that can meet this demand.

Embodiments of the invention will be described with reference to the drawings.

In FIGS. 1 and 2, 1 is a platen, and 2 is a printing paper placed closely thereto.

5 is the carriage body, and the front shaft 5 is attached to the bearing metal 4.4I.
and is slidably held on the rear shaft 6.

7 is an elastic spoke having type 8 at its tip, a selection motor, and 10 is a printing hammer mechanism. 11 in Figure 2
A printing ribbon cassette 12 stores a printing ribbon for printing #i2 lines, and a correction ribbon cassette 12 stores a correction ribbon having a width of 1 line.These are installed on a stand 16 with the correction ribbon cassette 12 facing down. ing. Frame 15u-? It is mounted so that it can move up and down using a support shaft 14 provided at the rear of the spear body 5 as a fulcrum. Reference numeral 15 denotes a drive gear, which meshes with an auxiliary gear 17 attached to the rotating shaft of a drive motor 16 (Fig. 91). 18 is the drive lever,
One end of the pot is rotatably attached to the tip of the pedestal 15,
The other end is rotatably connected to a drive pin 19 provided on the vehicle 15. The gear 1 is rotated by the rotation of the drive motor 16.
7.15 rotates in the direction of the arrow, and the drive lever 18 rotates the pedestal 15 about the support shaft 14. The above is the mechanism for vertically moving the ribbon cassette 11 and 12.

Next, the ribbon feeding mechanism will be explained. As shown in FIG. 6, feeding of the printing ribbon and the correction ribbon is carried out by the pitch roller 20 intermittently rotating the winding wheel 21. The take-up reel 21 is in pressure contact with the pitch roller 20 by a spring 22, and the pitch roller 20
1 is driven by the feed gear 25. As shown in FIG. 4, the pitch rollers include a first pitch roller 20α that feeds the winding reel 21α of the printing ribbon, and a second pitch roller 20b that feeds the winding reel 21A of the correction ribbon. It becomes more.

25α, 25Aij, 20α, and 20.6, respectively.

Note that these axes are formed concentrically.

24 is a link guide, and as shown in FIG. 5, 25b is attached so as to protrude into the center of the guide grooves 25g and 25b. This linker has 4 dots 24, 26α and 25b, and a pitch roller 20G with the same axis.
, 20A are attached to the pedestal 15 and move in conjunction with the vertical movement of the pedestal 13. In addition, the pitch rollers 20α, 2
04 is the L take-up reel 211L during revolving/crossing.

21b.

Sentada Daya 2! Ia, 251r transmission is 3 links 26
．． This is done by a link mechanism extending from 27 to 28.

One end of the 19th gear 26 is rotatably supported by the drive bin 19, and the other end is rotatably supported by the 19th gear 26.
It is rotatably connected to -y- of the lever 27. The center portion of the second link 27 is rotatably held on the rotating shaft of the drive motor 16, and the other end is rotatably connected to one end of the third link 28. The other end (tip part) of the three-striped link 2B is provided with a feeding pipe (Figs. 1, w, 4), and this receptacle bottle 29 can be moved along the guide grooves 25g and 25b. As such, it is biased by spring 3D. The guide grooves 25α, 25b have excessive gears 25α,
Since 23b is Bunjin, excessive pin 29 is next to kite 25
When passing through g or 25b, the sending gear 25g or 25A
You can send only one pitch. 51#'i This is a claw for preventing reverse rotation.

When the feeding bottle 29 passes through one of the guides #125α and 25b and reaches the communicating portion at both ends, as shown in FIG. The groove moves to the other guide groove.

Among the functions of the present invention, printing will be explained first. When printing is stopped, the printing ribbon 54 is located below the type 8 and at an angle α with the line of sight 35 for better visual visibility, as shown in FIG. The printing ribbon 34 has a width for 2 Fi2 printings, and a indicates the center of the upper printing, b indicates the center of the lower printing, and the center position of the CFi correction ribbon 55, respectively. When printing, a signal is sent to a character selection motor 9 to rotate the assembly of elastic spokes 7 and select a designated character 8. At the same time, by driving the drive motor 16 to push up the stand 1!1, the upper position α of the printing ribbon S4 stored in the printing ribbon cassette 11 is aligned with the center of the type 8, and a signal is sent to the printing hammer mechanism 10. is sent to print the selected type 8 on the printing paper 2. When printing the next character, the character selection motor 9 selects the next character, and the drive motor 16 pushes up the printing ribbon 34 so that the lower position is located at the center of the character.

When printing is performed at high speed, the drive motor 16 is rotated alternately in forward and reverse directions, thereby alternately displacing the positions VC of a and h. When the printing interval is long, the drive motor 16 is controlled so that the printing ribbon 54 is positioned at the angle α (home position tit) as shown in FIG. 1tC of the correction ribbon 55 is pushed up to the printing surface, one stroke of the type is printed, and the carbon is removed.This pushing up of the correction ribbon 55 is done in order to ensure that there is an excess of the ribbon. The operating position is increased so that the tortoise is alternately displaced between the home position tIt and !l'c position.

Next, the ribbon feeding operation will be explained. Drive motor 1
6 is driven and the drive gear 15 rotates in the direction shown by the arrow in FIG. 2, the feed pin 29 provided at the tip of the fifth link 28 moves through the guide groove of the link kite 24 from left to right.

In FIG. 5, when the feed bin 29 is at the d position, printing is stopped, and the printing ribbon 54 is at the home position. α1 is when the upper position α of the printing ribbon 54 is pushed up in the printing direction, bl is the center C of the stop ribbon 35 when the lower position b of the printing ribbon 54 is pushed up towards the printing surface. It shows the position of the feeder pin 290 when it is pushed up onto the printing surface. Feed bin 2 for printing
The operation of 9 is: it −+ a 'p for high speed, 6+
→ α1 → b1 → It moves back and forth between α1 and α1, b1,
When printing is not performed for a certain interval or more, it waits at position d. When the feed bin 29 moves back and forth between αl and b1, a
When '-*b', the gear 23a moves beyond the feed gear 23α which enters the μjJ side groove 25α, but when it goes from bl→α1, the shift gear 23a is rotated one pitch. Printing ribbon 54
is printed at the α position, then printed at the b position, and then moved to the C position, when the printing ribbon 54 is fed one pitch. When correcting a misprint, the feed bin 29 is
As described above, during the upward displacement of the correction ribbon 55, the correction ribbon 55 is at its maximum. When pushing up the correction ribbon 55, the feeding bottle 29 passes through the guide groove 25α, but when moving from BL to CI, it pushes out the spring plate 52 and moves to the kite groove 25b. Correction ribbon 35 or C
When it is stamped at the position and returns to the home position, the feed bin 29
passes through the kite [25b, at this time the send-off is 25b
Send by 1 pitch.

When the bin 29 reaches the left end of the guide 1s25b, it pushes out the splash plate 52' and returns to position d.

As described above, the printing device of the present invention includes a type selection motor 9 that drives an assembly of a large number of elastic spokes 7 having type characters 8, and a type printing device that prints the type selected by the type selection motor 9. A drive for moving the printing ribbon 54 or the repair ribbon 55 to the printing surface by vertically moving the marking mechanism 10, the pedestal 15 to which the printing ribbon cassette 11 for storing the printing ribbon and the repair ribbon cassette 12 for storing the correction ribbon are attached. lever 18 and the printing ribbon 54
and an excess bin 297jt for feeding the first and llA2 °-゛゛-feeding gears 23a, 25b provided coaxially with the first and second pinch rollers 20Q, 2014 for feeding the correction ribbon 55; The driving lever and the ripping mechanism are
The link mechanism is configured to be driven by a drive motor 16, and both ends thereof are rotatably attached to the drive pin 19 of the drive lever girder and the pedestal 13, and the link mechanism is connected to the drive pin 19 and the frame 13. A first link 26 has one end rotatably attached, one end of which is rotatably connected to the other end of the 19th link 26, and an intermediate portion is rotatably supported on one rotational axis of the drive motor 16. Swollen second link 2
7, and the second and third slides 28 and 28 which have the feeding bottle 29 attached to the other end, and the first and second slides 23α and 254 are connected at both ends. The first guide monument 2 s a and si of the link kite 24 which has the first kite adjacent 25 g and the second guide @ 25 b connected above and below
The two kites 256 are respectively entered, and the feed bottle 29 is configured to move by reciprocating or passing through these kites.

As mentioned above, the printing device of the present invention is configured to move the printing ribbon and correction ribbon up and down and feed the fixed amount for each printing using a single drive motor. The structure is simpler than that of the conventional method, and the number of parts can be greatly reduced. As a result, assembly productivity is improved and not only can it be provided at a low price, but also The moving carriage body has a number of excellent effects, including a smaller lid, improved printing speed, and reduced noise.

[Brief explanation of the drawing]

No. 1N: Figure 1 of the embodiment of the printing device of the present invention Figure 2: 5111 side view of the first device Figure 5: Partial plane of the ribbon cassette - Figure 4: Rolls of printing ribbon and correction ribbon Side cross-sectional view of the removal part Figure 5: Link guide hooked box Figure 6: Explanation of the position of the printing ribbon and modified IJ bong relative to the type [Symbols] 1...Platen, 2...Printing paper, 3・・・
・Ki, ridge body, 4.41...Bearing metal, 5...
・Front axis, 6... Rear axis, 7... Elastic spoke, 8...
・Print, 9...Print selection motor, 10...Print hammer mechanism, 11...Print ribbon cassette, 12...
Repair rib/cassette, 13... Frame, 14... Support shaft, 15... Drive gear, 16... Drive motor, 17...
... Auxiliary gear, 18... Drive lever, 19... Drive pin, 20α, 20b... Pinch roller, 21α, 2
1b... Take-up reel, 22... Splash, 25a, 25
I6...Sendoff Gya, 24...Link guide, 25t
L, 25b--guide groove, 26.27.2B--first, second, third link, 29...feeding pin, 30...
・Spring, 31...Claw, 32.52'...Spring plate! +3... line of sight, 54... print revolving y155.
... Corrected Ribbon Figure 3 Army Figure 5 Atsushi 4 Illustration 6 Figure

Claims (2)

[Claims] (1) a type selection motor that drives an assembly of a large number of elastic spokes having type; a printing hammer mechanism that prints the type selected by the type selection motor;
a drive lever that moves the printing ribbon or the correction ribbon to the printing surface by vertically moving a stand to which a printing ribbon cassette for storing the printing ribbon and a correction ribbon cassette for storing the correction ribbon are attached; and the printing ribbon and the correction ribbon. The drive lever and A printing device characterized in that the link mechanism is driven by a 1@ drive motor. (2) The drive lever is a supplementary lever attached to the same rotating shaft of the drive motor. A drive pin provided on a drive gear meshing with the gear, and both ends of which are rotatably attached to the pedestal,
The link mechanism includes a first link, one end of which is rotatably attached to the drive pin, one end of which is rotatably coupled to the other end of the first link, and an intermediate portion connected to the same rotational shaft of the drive motor. a second link rotatably supported by the second link;
Printing device (5) according to claim (1), characterized in that it is similar to a fifth link, one end of which is rotatably connected to the other end of the link, and the feed pin is attached to the other end.
41I The first and second feeding gears are inserted into the first guide groove and the W and second guide grooves of the link guide, which has a first kite groove and a second guide groove above and below, both ends of which communicate with each other. 9. The printing device according to claims (1) and (2), characterized in that the feeding is performed by the feeding pin reciprocating or passing through the guide groove.